Surface characterization and bonding properties of milled polyetheretherketone dental posts

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Benli M., Eker Gümüş B., Kahraman Y., Huck O., Özcan M.

Odontology, vol.108, no.4, pp.596-606, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 108 Issue: 4
  • Publication Date: 2020
  • Doi Number: 10.1007/s10266-020-00484-1
  • Journal Name: Odontology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, MEDLINE
  • Page Numbers: pp.596-606
  • Yıldız Technical University Affiliated: Yes


PEEK has been used in many dental applications except intra-radicular post. The aim of this study is to test polyetheretherketone

(PEEK) as a dental post material through tensile bond strength (TBS) and surface roughness (SR), and to compare

it with glass-fiber and cast-metal posts. Thus, 60 human maxillary central incisors with a single root were endodontically

treated and divided into three groups (n = 20) according to the type of post (Group P: PEEK, Group F: Glass-fiber, Group

M: Cast-metal). Appropriate surface treatment was employed for each group and SR was determined by a three-dimensional

non-contact profilometer before cementation. All posts were luted to the canal dentin using self-etch resin cement (Panavia

F2.0). Pull-out test was performed on a universal testing machine at a speed of 0.5 mm/min crosshead speed until failure,

and TBS were calculated. One-way ANOVA, Tukey’s HSD, and Pearson chi-squared tests were performed for statistical

analyses (α = 0.05). According to the results, group F demonstrated the highest SR (2.93 ± 0.18 μm) and lowest TBS values

(10.05 ± 0.53 MPa), while group P exhibited lowest SR (1.37 ± 0.11 μm) and highest TBS values (14.33 ± 0.58 MPa)

(p < 0.001). No significant differences in failure modes were identified among groups, mostly adhesive (p = 0.243). As

conclusion, PEEK may be a reliable and contemporary option for dental post systems when used with appropriate surface

treatment and luting agent. This high-performance polymer may be a novel candidate as a contemporary dental post system

due to its superior mechanical, chemical, thermal, and esthetical properties with low risk of fracture.